Mr(Ca(OH)2)=Ar(Ca)40+Ar(O)16×2+At(H)1×2=74
W(Ca)=40/74×100=54%
W(O)=32/74×100=43%
W(H)=100-(54+43)=3%
Mr(Ca(OH)2)=Ar(Ca)40+Ar(O)16×2+At(H)1×2=74
W(Ca)=40/74×100=54%
W(O)=32/74×100=43%
W(H)=100-(54+43)=3%